Siemens SIMATIC S7 F User Manual

Fail-Safe Blocks
Fail-Safe Systems
8-134 A5E00085588-03
8.15.3 Errror Information in the Diagnostic Buffer
The table below contains all the causes for an error entry in the Diagnostic Buffer.
Which errors are detected in which block is described for each fail-safe block.
The error code and thus the cause of the error can also be obtained.
Error Codes in Diagnostic Buffer
Invalid Number
Error Code (W#16#...) Cause Remedies
75D9H
This event is posted to notify the user
that a floating point math calculation
within a function block resulted in an
invalid floating point value. This value is
typically represented as 1.#QNAN or –
1.#IND. Typically the result of
unexpected results of previous function
blocks’ calculations, such as +/- infinity
This event contains the Instance DB
number of the function block that
encountered this invalid calculation. Use
the DB number to identify the function
block within the project that has this
failure.
1. Open the CFC Editor and click on
the cross reference button.
2. Choose “Edit “Find… and enter “DB
xxx“, where “xxx is the DB number
being reported in the error event.
Once you identify the line in the
cross reference list, double click on
it. It will automatically open up the
chart containing the function block
that reported the error.
Please check the input values for the
valid number range.
F-specific error
Error Code (W#16#...) Cause Remedies
75DAH
An incorrect online modification of the
Safety Program.
The fault due to an internal failure of the
RAM or F-CPU.
• Restart the Shutdown logic.
-or-
• Stop and ColdStart F-CPU.
-or-
• Full Download of the complete
program to F-CPU.
-or-
• Replace the F-CPU.

Siemens SIMATIC S7 F Specifications

General

Brand	Siemens
Model	SIMATIC S7 F
Category	Controller
Language	English